Toward Elucidating the Role of Number of Oxazine Rings and Intermediates in the Benzoxazine Backbone on Their Thermal Characteristics
作者:N. K. Sini、Takeshi Endo
DOI:10.1021/acs.macromol.6b01965
日期:2016.11.22
We have developed novel di-, tri-, and tetrafunctional benzoxazine monomers (BZ2, BZ3, and BZ4), solely containing benzoxazine moieties arranged one after the other on the backbone, to discover the role of additional oxazine moiety on thermal properties. A tandem reaction was adapted, at first a ring-closure and then subsequent Mannich condensation by reacting 2-((4-hydroxyphenyl)aminomethyl)phenol
我们开发了新颖的二,三和四官能苯并恶嗪单体(BZ2,BZ3和BZ4),它们只包含在主链上一个接一个排列的苯并恶嗪部分,以发现其他恶嗪部分对热性质的作用。进行串联反应,首先进行闭环反应,然后进行曼尼希缩合反应,方法是使2-((4-羟苯基)氨基甲基)苯酚(HPAMP)与苯胺/ 4-氨基-2-((苯基氨基)甲基)苯酚/在多聚甲醛的存在下,将4-氨基-2-((((4-羟基-3-((苯基氨基)甲基)苯基)氨基)甲基)苯酚制得BZ2 / BZ3 / BZ4。还通过使HPAMP与p反应生成了含有中间基团(R-BZ4)的四官能苯并恶嗪单体。-苯二胺/ 4,4'-二氨基二苯甲烷(PDA / DDM)了解热性质的差异,这是由于两个苯并恶嗪基团之间的距离所造成的。随着恶嗪环数量的增加(在DSC和TGA分析中),观察到的结果包括(i)固化温度从264°C(BZ1)降低到237°C(BZ4),但是BZ4之间的中间距离将固化温度提高到245